Spare rubber gasket for JLW-Canners canning pressure gauge.
JLW-Canners Canners Vacuum Gauge
Size: 2" [50 mm]
Range: Vacuum, 0-30" Hg
Canning vacuum pressure gauges are designed to check the vacuum in a sealed can or jar. These gauges can be used on on canned food or drinks. The test is performed by pressing the needle of the gauge through the top of the can. The rubber gasket ...